Compilare: user.c: In function ‘main’: user.c:34:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.c:38:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d ", &nrlin, &nrcol, &q); ^ user.c:40:14: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(sir, MAXN+2, fin); ^ user.c:91:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &l1, &c1, &l2, &c2); ^